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Vulnerability record · CVE-2021-36872 · published 23 September 2021

CVE-2021-36872: Wordpress popular posts project wordpress popular posts cross-site scripting vulnerability

WWordpress Popular Posts Project · Wordpress Popular Posts

Authenticated Persistent Cross-Site Scripting (XSS) vulnerability in WordPress Popular Posts plugin (versions <= 5.3.3). Vulnerable at &widget-wpp[2][post_type].

5.4 CVSS 3.1 Medium EPSS 0.59% · top 54.2% CWE-79 · Cross-site scripting
5.4CVSS 3.1 base score, v2 3.5
0.59%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
4References
17 Jun 2026Last modified by NVD

Description

Authenticated Persistent Cross-Site Scripting (XSS) vulnerability in WordPress Popular Posts plugin (versions <= 5.3.3). Vulnerable at &widget-wpp[2][post_type].

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/cabrerahector/wordpress-popular-posts/blob/master/changelog.md Release NotesThird Party Advisory
https://patchstack.com/database/vulnerability/wordpress-popular-posts/wordpress-popular-posts-plugin-5-3-3-authenticated Third Party Advisory
https://github.com/cabrerahector/wordpress-popular-posts/blob/master/changelog.md Release NotesThird Party Advisory
https://patchstack.com/database/vulnerability/wordpress-popular-posts/wordpress-popular-posts-plugin-5-3-3-authenticated Third Party Advisory

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Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2021-36872), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.